fix: show Note type in sidebar instead of excluding it as default/fallback

Note was explicitly excluded from collectActiveTypes() via `e.isA !== 'Note'`.
Removed the exclusion so Note appears like any other type. Untyped entries
(isA === null) now count as Note in both type collection and section filtering.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/components/Sidebar.test.tsx

@@ -914,6 +914,63 @@ describe('Sidebar', () => {
     })
   })
 
+  describe('Note type in sidebar', () => {
+    const noteEntries: VaultEntry[] = [
+      ...mockEntries,
+      {
+        path: '/vault/note.md', filename: 'note.md', title: 'Note', isA: 'Type',
+        aliases: [], belongsTo: [], relatedTo: [], status: null, owner: null, cadence: null,
+        archived: false, trashed: false, trashedAt: null, modifiedAt: 1700000000, createdAt: null,
+        fileSize: 200, snippet: '', wordCount: 0, relationships: {},
+        icon: null, color: null, order: null, sidebarLabel: null, template: null, sort: null,
+        outgoingLinks: [], properties: {},
+      },
+      {
+        path: '/vault/explicit-note.md', filename: 'explicit-note.md', title: 'Explicit Note',
+        isA: 'Note', aliases: [], belongsTo: [], relatedTo: [], status: null, owner: null,
+        cadence: null, archived: false, trashed: false, trashedAt: null, modifiedAt: 1700000000,
+        createdAt: null, fileSize: 300, snippet: '', wordCount: 0, relationships: {},
+        icon: null, color: null, order: null, sidebarLabel: null, template: null, sort: null,
+        outgoingLinks: [], properties: {},
+      },
+      {
+        path: '/vault/untyped-note.md', filename: 'untyped-note.md', title: 'Untyped Note',
+        isA: null, aliases: [], belongsTo: [], relatedTo: [], status: null, owner: null,
+        cadence: null, archived: false, trashed: false, trashedAt: null, modifiedAt: 1700000000,
+        createdAt: null, fileSize: 150, snippet: '', wordCount: 0, relationships: {},
+        icon: null, color: null, order: null, sidebarLabel: null, template: null, sort: null,
+        outgoingLinks: [], properties: {},
+      },
+    ]
+
+    it('shows Notes section when Note entries exist', () => {
+      render(<Sidebar entries={noteEntries} selection={defaultSelection} onSelect={() => {}} />)
+      expect(screen.getByText('Notes')).toBeInTheDocument()
+    })
+
+    it('includes both explicit and untyped notes under Notes section', () => {
+      render(<Sidebar entries={noteEntries} selection={defaultSelection} onSelect={() => {}} />)
+      fireEvent.click(screen.getByLabelText('Expand Notes'))
+      expect(screen.getByText('Explicit Note')).toBeInTheDocument()
+      expect(screen.getByText('Untyped Note')).toBeInTheDocument()
+    })
+
+    it('shows Notes section for untyped entries even without explicit Note entries', () => {
+      const untypedOnly: VaultEntry[] = [
+        {
+          path: '/vault/plain.md', filename: 'plain.md', title: 'Plain Note',
+          isA: null, aliases: [], belongsTo: [], relatedTo: [], status: null, owner: null,
+          cadence: null, archived: false, trashed: false, trashedAt: null, modifiedAt: 1700000000,
+          createdAt: null, fileSize: 100, snippet: '', wordCount: 0, relationships: {},
+          icon: null, color: null, order: null, sidebarLabel: null, template: null, sort: null,
+          outgoingLinks: [], properties: {},
+        },
+      ]
+      render(<Sidebar entries={untypedOnly} selection={defaultSelection} onSelect={() => {}} />)
+      expect(screen.getByText('Notes')).toBeInTheDocument()
+    })
+  })
+
   it('renders exactly one section for a hyphenated custom type like Monday Ideas', () => {
     const entriesWithMondayIdeas: VaultEntry[] = [
       ...mockEntries,

src/components/Sidebar.tsx

@@ -115,7 +115,9 @@ function SortableSection({ group, sectionProps }: {
     & { entries: VaultEntry[]; collapsed: Record<string, boolean>; onToggle: (type: string) => void; renamingType: string | null; renameInitialValue: string }
 }) {
   const { attributes, listeners, setNodeRef, transform, transition, isDragging } = useSortable({ id: group.type })
-  const items = sectionProps.entries.filter((e) => e.isA === group.type && !e.archived && !e.trashed)
+  const items = sectionProps.entries.filter((e) =>
+    !e.archived && !e.trashed && (group.type === 'Note' ? (e.isA === 'Note' || !e.isA) : e.isA === group.type),
+  )
   const isCollapsed = sectionProps.collapsed[group.type] ?? true
   const isRenaming = sectionProps.renamingType === group.type
 

src/utils/sidebarSections.ts

@@ -26,11 +26,11 @@ const BUILT_IN_SECTION_GROUPS: SectionGroup[] = [
 /** Metadata lookup for well-known types (icon/label only — NOT used to determine which sections to show) */
 const BUILT_IN_TYPE_MAP = new Map(BUILT_IN_SECTION_GROUPS.map((sg) => [sg.type, sg]))
 
-/** Collect unique isA values from active (non-trashed, non-archived) entries, excluding generic Note */
+/** Collect unique isA values from active (non-trashed, non-archived) entries. Untyped entries count as 'Note'. */
 export function collectActiveTypes(entries: VaultEntry[]): Set<string> {
   const types = new Set<string>()
   for (const e of entries) {
-    if (e.isA && e.isA !== 'Note' && !e.trashed && !e.archived) types.add(e.isA)
+    if (!e.trashed && !e.archived) types.add(e.isA || 'Note')
   }
   return types
 }